/*******************************************************************************
 * Copyright (c) 2011 Erik Byström.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package se.slackers.automatunes.util;

/**
 * @author Erik Byström
 * 
 */
public abstract class Pair<F extends Comparable<? super F>, S> implements Comparable<Pair<F, ?>> {
	public abstract F first();

	public abstract S second();

	@Override
	public int compareTo(final Pair<F, ?> o) {
		return first().compareTo(o.first());
	}

	@Override
	public String toString() {
		return String.format("(%s,%s)", String.valueOf(first()), String.valueOf(second()));
	}

	public static <F extends Comparable<? super F>, S> Pair<F, S> create(final F first, final S second) {
		return new Pair<F, S>() {
			@Override
			public F first() {
				return first;
			}

			@Override
			public S second() {
				return second;
			}
		};
	}
}
